Gib is going to spray the cat with water if they all survive this.
OK, so here's Gib's intent. If Aranwen doesn't call out orders, Gib will "suggest" that he lead Cedric and the woodsman into the cabin while the others deal with the zombies. Something like, "Cedric, with me!" Assuming that the woodsman is going to run straight for the cabin, he sees no need to call him forward. If at all possible, he'll attempt to move in such a way as to keep the woodsman in sight at all times. He still doesn't trust the man or the situation.
Offense: First, Turn Undead. Then, shield bashes past any zombies in the way and attempts to clear the path for those entering the cabin if necessary. Use the sword if the opportunity presents itself to slash as he's moving past, but his main objective is to get inside.
Defense: Find a way to put something solid and impassible at his back, hunker down and use his shield in defensive fighting, his sword for opportune strikes. Turn Undead as he can to keep the enemy at bay.
Support: If any of his companions look to be in dire need of healing, Gib will work his way to that companion's side as he can and even at risk to himself, pray for a miracle.